Hammering-machine



J. LEDWINKA. HAMMERING MACHINE.

APPLICATION FILED APR. 12, I9I7 1 385 1 1 Patented July 19, 1921.

2 SHEETS-SHEET I.

J. LEDWINKA.

HAMMERING MACHINE.

APPLICATION FILED APR.12. I917.

Patented July 119, 1921.

2 SHEETS-SHEET 2- till ETAMHEEBTHGQEACHTNE.

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To all whom may concern Be it lrnown that l, Josnrir Lnnvvrnna, a citizen of the United States, residing at Philadelphia in the county oi Philadelphia and State oi Tennsylvania, have made a cer tain new and useful invention in Hammering-l/iachines, of which the following is a specification.

This invention relates to hammering machines.

The object of the invention is to provide a hammering machine which is simple ill structure, efficient in operation, and which is easily operated.

it further object oi the invention is to provide an electrically operated hammer machine.

A further object of the invention is to provide a machine oil the character described, which may be readily controlled both as to speed and power.

A further object oi-the invention is to provide a machine or the character described which is portable, and wherein the vibration due to the hammering action is absorbed.

A further object of the invention is to pro vide a hammering machine in which anvils are disposed at opposite sides of a central supporting standard which is portable, whereby the anvil reactions, in the operation of the machine, taking place on opposite sides oithe supporting standard, are transmitted to the supporting standard and tend to counterbalance each other, thereby securing stability of the entire structure, while at the same time the vibrations are absorbed in the machine itself or else are transmitted to and distributed in the floor upon which the portable standard rests instead of in a supporting wall or column of the building.

Further objects of the inventionwill appear more fully hereinafter.

The invention consists substantially in the construction, combination, location and relative' arrangement of parts, all as will be more fully hereinafter set forth, as shown by the accompanying drawings and finally pointed out in the appended claims.

Referring" to the drawings Figure 1 is a view in side elevation partly broken away, partly in section, of a hammering machine embodying my invention;

Fig. 2 is a view in end elevation of the same.

Fig. 3 is a sectional view taken on the line Specification of Letters Patent, Patnmtgqfl J u fly 1Q), 119%1,

3-3, Fig. 2, and looking in the direction oi t e arrows.

Fig. d 15 an enlarged detail view of the hammer seat with the hammer removed.

The same part is designated by the same reference numeral whereverit occurs throughout the several views.

Tn machines oi this nature, where hammering out of heavy material, such as steel plates or the like is to be done, the machine sometimes has been carried by brackets or arms secured on the wall of the building or on a structure column and sometimes the shaft of the machine which actuates the hammer, has been operated by a belt from overhead shaiting. in such cases great objections and difiiculties have arisen, principal among which being that in addition m the inconvenience and the extra equipment necessary, the machine, once set up, has been permanently placed and has not been por able irom place to place to suit the convenience of the shop where the same was installed. ln addition, where the hammer is operating at an enormous speed and the number of hammer blows produced has been great, the vibrations caused thereby are imparted to the entire building structure in the case where the machine is attached to the wall or a structural column thereof.

It is among the special purposes of my present invention to obviate these dificulties and objections and'to provide a hammering machine which is electrically driven, thereby eliminating the belt, overhead shafting, and other equipment incident thereto, and to make the machine portable, and further to counterbalance and absorb the vibrations caused thereby without imparting the same to the building frame.

T will now describe a specific structure embodying the principles of my invention.

in accordance with my invention, 1 provide a suitable frame indicated at 1 which may be of any desired shape or material. I prefer however, to make the same of metal, comprising a base portion 2 and a column portion 3. if desired, the base portion may be provided with suitable legs or feet 4 to rest upon the floor or ground in any desired location. The column 3 supports at its upper end the motor frame 5, in which is mounted the electric motor 6. The motor 6 is positioned centrally in the upper end of the column 3, with its shaft 7 lying horibll 22 and till zontally. While in this specific structure the shaft of the motor is lying horizontally, my invention as defined in the claims is not to be limited in this respect, as it is obvious that with but slight modification involving more mechanical skill by those skilled in the art, the motor may be placed in any desired position while remaining centrally of the supporting column. Secured to the upper end of thecolumn 3 at opposite sides thereof and extending laterally froin said column are frames 13.. The hammer devices and their driving and control connections are supported upon these frames 13. The hammers coact with anvils 26 which are sup-- ported upon brackets 25 disposed at opposite sides of the central supporting column 3 and are secured thereto near the lower end there of. Since the structures of hammers, their driving and control connections and their co operating anvils and their supports are the same at each side of the central supporting; column, specific illustration and description of the structure at one side of the supporting column will suflice for a complete understanding of my invention and its principle or mode of operation Mounted in each latorally extending frame 13 is a shaft 8, which is rotated by the shaft 7 of the-motor 6 in any suitable way, for example, by coupling, shown at 9, and is provided with friction cone 10 which cone is adapted to engage a cotiperating friction seat cone ll, carried by shaft 12, which extends through the frame 13 and is provided at its outer end with the hammer seat 14;. Thus it will be seen that when the motor 6 is rotated the hammer seat 14 will be rotated in accordance with degree of friction maintained be tween friction drums l0 and 11.

Each hammer mechanism consists of a stud 15, which is dove-tailed, as indicated at 16, at one end, and is provided with ex terior screw threads at the other end, The dove-tailed end the stud 15' is secured to the hammer seat 14: by means of the dove tailed groove 1'? formed therein. The collar 19 is carried by the stud 15, which collar is held in place by the 20 on the threaded end of stud 15. Thus it will be seen by tightening" the nut 20 on the stud 15, the stud l5 may be securely fastoned in position in the groove 17 of the hammer seat let. The collar 19 carries the elliptic 21 to the ends of which is cured at strip 22 lt is desirable to aidord a limited amount of flexibility to the strip l for this purpose 1 find it satisfactory to make the strip 22 of leather, The strip 22 carries at its approximate center the barn mer proper 23, the head 24% of which is secured thereto in any desired manner, as, for example by the dove-tailed arrangement as shown The anvil portion 27 of the machine is supper ed by a suitable braclret 25, suitinseam ably secured to the frame 1, for example, by bolts, and the anvil head 26 is secured to the anvil portion 27 in any suitable manner, as, for example by similar dove-tailed arrangement. By employing the removable hammer head and anvil head, it is obvious that various adjustments necessary or desired in hammering machines are readily secured by changing the size'of the heads and there: by the length of strokes, etc. Doors 28 may be provided to allow access to the motor if desired, and as shown,

A simple construction of central base and column for the machine is shown wherein the same are made in two parts, bolted together by suitable bolts 30. And the bracket supporting the anvil 27 may be reinforced by reinforcing rod 31 secured to the bracket and to the column of the machine.

The control of each hammer device is effected in any suitable or desired manner by controlling the position of the friction cone 10. In the form shown as illustrative of the principles of my invention, l provide a foot controlled bell crank lever 35, which operates the respective levers 3b, 37, 38 and 39 through suitable bell crank levers d0, 4:5 to control the movement of the friction cone 10. The lever 39 is pivotally secured at 40 and the end thereof remote from the lever 38 is secured a collar; ll the shaft 8 and so that the movement of the lever 39 about its pivot 510 in one direction or the other will insert or withdraw the friction cone 10 into or out of frictional engagement with the drum ll,

To absorb the vibration of the machine when in use I make the base and supporting column hollow and fill the same with concrete, sand, etc This makes the machine heavy at its base portion and thereby absorbs the vibration thereof due to the operation of the hammers as will be'readily understood.

As above indicated the hammer devices, their operating and control connections, and the anvils which'coact therewith and their supporting bracket are the same at each side of the central supporting column, and in Fig. l l have shown portions of the frame 13 and bracket-25,,and the treadle connec-. tions broken ofl' because of the limitation of the size of the sheet of drawing, But some thing more than a mere duplication of these parts is involved. It will be seen that by disposing hammer devices and coacting anvils at each side of a central portable supporting column the weights as well as the reactions of the hammers when in operation tend to balance each other and the vibrations due to their operation are transmitted to the central column and its supporting base and are for the most part absorbed therein, and such of the vibrations as are slidably mounted on secured to the friction cone lllb lllti llll llb

nsaaoia not so absorbed are distributed through said column and base to the floor on which the machine rests, thereby not only securing great stability of the machine but also relieving the frame structure of the walls of the building or their supporting columns of such vibrations, while at the same time the entire machine, being portable, is shiftable from point to point about the factory according to the convenience and conditions encountered in its use.

Having now set forth the objects and nature of my invention, and having shown and described one structure embodying the principles thereof, what I claim as new and useful and desire to secure, by Letters Patent is 1. In a self contained sheet metal hammerin machine a su orti column amotor mounted centrally in the upper end of said column, hammer device supporting frames secured to the upper end of said column and extending laterally therefrom at opposite sides thereof, means actuated by said motor for-operating the hammer devices, and an anvil supporting bracket mounted uponsaid column near the lower end and extending laterally from each side thereof in cooperative relation with respect to the hammer device supporting frames whereby the reactions of the hammer devices are transmitted to and centered in the supporting column.

2. In a self contained sheet metal hammering machine, a central portable support ing column, a hammer device supporting frame and a coacting anvil supporting bracket mounted thereom at each side thereof, said frames and brackets being located respectively at the upper and lower ends of and extending'laterally from said standard, a motor mounted centrally in the upper end of said column, w'nnections actuated by said motor for operating each hammer device, and means to independently control said connections.

In. testimony whereof I have hereunto set my hand on this fifth day of April A. D,

JUSEPH LEDWINKA. 

